I'm grateful to those tracking and publishing this information, but as smoking guns go, the evidence doesn't seem particularly compelling.
China announced their rare-earth restrictions on 10/9. Trump predictably over-reacts with tariffs on 10/10. The trader had plenty of reason to expect new tariffs, and some reason to expect Bitcoin to go down.
If I were corrupt, I'd always make sure there was some justifying event in advance of my trade, even if I knew there was to be some precipitating event for a market swing. Plausible deniability.